What makes it quietly significant is its name: the site appears on the 1842 Ordnance Survey six-inch map as Killeen Burial Ground. A killeen, sometimes spelled cillin, was an informal, unconsecrated burial ground used for those who could not be interred in sanctified soil according to Catholic practice, most commonly unbaptised infants, but sometimes also including suicide victims, strangers, or those otherwise excluded from the parish graveyard. These sites were usually modest, unmarked, and deliberately set apart, tucked into field margins, townland boundaries, or, as here, a level shelf on a sloping pasture.

The 1842 mapping records the site at a moment when such places were already beginning to fall out of active use, as attitudes towards burial and the pastoral care of the dead slowly shifted across the nineteenth century. By the time cartographers noted it, Teeranassig's killeen was likely already a relic rather than a functioning burial space. Its position on a break in the slope, that subtle flattening of the hillside, is typical of how these sites were chosen, often on ground that was marginal for agriculture and thus left undisturbed long enough for a quiet tradition to establish itself.

Today the site lies within pasture but is described as inaccessible owing to heavy overgrowth, meaning the ground itself has effectively reclaimed what the community once quietly set aside.